Title Long-term immunogenicity and immune memory response to the hepatitis B antigen in the RTS,S/AS01(E) malaria vaccine in African children: a randomized trial.
Author Valea, Innocent; Adjei, Samuel; Usuf, Effua; Traore, Ousmane; Ansong, Daniel; Tinto, Halidou; Owusu Boateng, Harry; Some, Athanase Mwinessobaonfou; Buabeng, Patrick; Vekemans, Johan; Kotey, Amos; Vandoolaeghe, Pascale; Cullinane, Mark; Traskine, Magali; Ouedraogo, Florence; Sambian, David; Lievens, Marc; Tahita, Marc Christian; Jongert, Erik; Lompo, Palpouguini; Idriss, Ali; Borys, Dorota; Ouedraogo, Sayouba; Prempeh, Frank; Schuerman, Lode; Sorgho, Hermann; Agbenyega, Tsiri
Journal Hum Vaccin Immunother Publication Year/Month 2020-Jun
PMID 31951771 PMCID PMC7482624
Affiliation + expend 1.Unite de Recherche Clinique de Nanoro, Institut de Recherche en Sciences de la Sante , Nanoro, Burkina Faso.

RTS,S/AS01(E) malaria vaccine contains the hepatitis B virus surface antigen and may thus serve as a potential hepatitis B vaccine. To evaluate the impact of RTS,S/AS01(E) when implemented in the Expanded Program of Immunization, infants 8-12 weeks old were randomized to receive either RTS,S/AS01(E) or a licensed hepatitis B control vaccine (HepB), both co-administered with various combinations of the following childhood vaccines: diphtheria-tetanus-acellular pertussis-Haemophilus influenzae type b, trivalent oral poliovirus, pneumococcal non-typeable Haemophilus influenzae protein D conjugate and human rotavirus vaccine. Long-term persistence of antibodies against the circumsporozoite (CS) protein and hepatitis B surface antigen (HBsAg) were assessed, together with the immune memory response to the HB antigen following a booster dose of HepB vaccine. Subgroups receiving RTS,S or the HepB control vaccine were pooled into RTS,S groups and HepB groups, respectively. One month post-HepB booster vaccination, 100% of participants in the RTS,S groups and 98.3% in the control groups had anti-HBs antibody concentrations >/=10 mIU/mL with the geometric mean concentrations (GMCs) at 46634.7 mIU/mL (95% CI: 40561.3; 53617.6) and 9258.2 mIU/mL (95% CI: 6925.3; 12377.0), respectively. Forty-eight months post-primary vaccination anti-CS antibody GMCs ranged from 2.3 EU/mL to 2.7 EU/mL in the RTS,S groups compared to 1.1 EU/mL in the control groups. Hepatitis B priming with the RTS,S/AS01(E) vaccine was effective and resulted in a memory response to HBsAg as shown by the robust booster response following an additional dose of HepB vaccine. RTS,S/AS01E when co-administered with PHiD-CV, HRV and other childhood vaccines, had an acceptable safety profile.

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